Centrifugal drier.



G. A. WENDELL CENTRIFUGAL DRIER.

APPLICATION FILED JULY 14. 1913.

'LEWMWW Patented Apr. 273-1915.

CAM A. WENDEIJXJ, 01E JOLIET, ILLINOEEQ.

CENTRIHUGAL DRIER.

nineties.

specification of Letters Eatent.

Patented Apr. 2%, rate.

Application filed July 14, 1913. Serial No. 778,865.

To all whom it may concern Be it known that f, CARL A. WENDELL, a citizen of the United States, residing at Joliet, in the county of Will and State of llllinois, have invented certain new and useful Improvements in Centrifugal Driers, of which the following is a specification.

My invention relates to drying-apparatus and has particular reference to a novel drier for use particularly in connection with coal or similar materials. A similar apparatus is disclosed in my co-pending application Serial No. 7 00,748, filed May 31, 1912.

A particular object in connection with the present apparatus is the employment of a hot air auxiliary in connection with the centrifugal separating or drying action. Preftit fit)

erably this hot air is supplied in any suit able manner and drawn through the materials to be dried by a suction force created by the rotating parts.

'A particularobject is the provision of two diflerentially rotating members each rotating in the same direction but at different speeds, one of said members supplying the material to be dried, the other member acting as a receiving, separating and delivering member. Thls latter member is so con 'structed as to avoid a series of pockets to which the material is delivered. In all the driers known to me the material is delivered from the spout into a series of pockets or recesses, these =pockets being formed by radial Walls. A particularly disadvantage arises from such construction in that as the material is delivered from the delivery spout practically tangentially a portion of the pocket is never supplied with the material due to the angle of the division wall, therefore only a portion of the screen is supplied with material thus limiting the separating power of the device.

A further object in the present device is to so arrange the screen located on the separating member as to practically force the materials downward when the trap or discharging device is actuated. It will be understood that in a continuous drier the receiving, separating and discharging member is constantly rotated at a high speed and that the centrifugal force acting on the material is considerable.

More specifically, the invention relates to an improvement on the drying apparatus disclosed in my allowed application for continuous automatic drier, filed May 31, 1912,

Figure 1 is a sectional elevation through a drier constructed in accordance with my invention, and Fig. 2 is a plan view also partlyin section. g Referringmore particularly to the draw ings it will be seen that I provide a frame structure composed of horizontal members 10, vertical members 1]., and upper hori-, 'zontal members 12.

Within the upper and lower horizontal members are provided bearings for a vertical shaft 13. To this vertical shaft is socured by means of a long sleeve, the receiving, separating and discharging parts of the device, these parts consisting of a middle portion 15, having a plurality of radial openings therein, these openin a being bounded by the vanes 16, incline at such an angle as to cause a suction of air. Other vanes, as at 17, may be provided on the over-hung portion of the center member 15. The over-hung portion is provided with an apron 18, whereby a fairly tight connection is made between the rotatable portion and an upstanding flange19, rigidly connected to the frame member 10.

Extending outwardly from the center member 15, are a plurality of brackets 20, carrying a floor 21, this floor having'secured at its outer end the screen member '22, this screen member being secured by means of steel brackets or posts 23, these posts being so arranged as to present practically an uninterrupted surface in the plane of the screens. Thus no pockets are formed. The space outside of the screens is somewhat constricted at the point 247, the water or liquid separated from the v material escaping through this point into the space 25, formed in the cover or inclosure 26, for the top and sides of the machine.

Formed in the fioor 21 of the rotatable member are thetraps 27, pivoted at 28, and

suitably counterwelghted to hold the device in closed position. The traps are opened by suitable toggles and bell cranks'termmating inan anti-friction roll 29, which roll is contacted at intervals by the differentially rothe material on the, screens and when such air is heated it will add to the drying effect. The delivery portion of the device consists of a pair of spouts 31, oppositely arranged, these spouts being mounted for independent rotation on the shaft 13 and being connected to abeveled gear 32 in mesh with a pinion 33. The shaft 13 is caused to rotate by the inter-meshing of beveled gear and pinion 34, 35. It will be noted that the gears 32, 33, 34 and 35 are in difierent proportions, thus causing a different speed of rotation in the same direction. Thus the spout will.distribute the material to the receiving member at regular intervals without attention. Like- Wise, as the structure carrying the spouts supports a cam, indicatedat 36 in Fig. 2,-

the traps 27 will be opened at the proper intervals to permit the escape of the dried material.

Secured to thetop Wall37, of the receiving member is an extension 38, which serves to prevent the inlet of air from the top. Also joining the sides of the spouts 31, are semi-conicalucover' plates 39, thus closing the space betweenfthe spouts. 'It'will be seen that-by this arrangement air is not permit ted to enter from the top of the device to the end that hot air may be led through the device from any suitable source as the header 40, connection being had from the header to the hollow frame member 10, and by means of openings 41, into the space beneath the member 15. By means of the vanes arranged on the rotatable members, air is sucked in and forcibly ejected through the water discharge openings, this hot air assisting in the drying operation.

While I have shown the device as provided with vanes in different locations, it

will be understood that these are not con- C'opies of this patent may be obtained for sidered absolutely essential as the'hot air 'might be forced through the device. It will the spirit of my invention.

I claim:

1. In a centrifugal drier, the combination of a frame, a pair of horizontal, rotatable, differentially geared members, one of said members being in the form of a delivery spout, the other of said members acting as a separating member whereby moisture is projected from the material by centrifugal action, said separating member consisting of a screen mounted at an angle to the vertical, there being a clear uninterrupted space between the path of the mouth of the spout and the screen, and the screen forming an. unbroken screening surface, and a trap mounted in said last named member and located beneath said screen whereby materials forced against said screen by the centrifugal force is by the same force projected downwardly and outwardly through said trap, substantially as described.

2. In a centrifugal drier device of the class described, the combination of aframe, a rotatable casing, a rotatable delivery spout, said casing and spout being differentially geared whereby both are rotated in the same direction but at different speeds, said casing being provided with a screen, said screen being secured to the bottom wall of said casing and extending upwardly and inwardly in a substantially straight line, there being a clear uninterrupted space between the path of the mouth of the spout and the screen, and the screen forming an unbroken screening surface, and a trap mounted. in the bottom wall of said casing, said trap serving the space over which said screen is inclined, and means for periodically opening said trap the arrangement bein such that centrifugal force tends to pro cct downwardly and outwardly materials forced against said screen, substantially as described.

CARL A. WENDELL.

Witnesses:

CnAs. C. STARK. J F. MOWAT.

Washington, I). G. 

